/Engine/Source/Runtime/GeometryFramework/Public/Components/DynamicMeshComponent.h
IRenderMeshPostProcessorSupport. If a RenderMesh Postprocessor is configured, then instead of directly passing the internal mesh to the RenderProxy, IRenderMeshPostProcessor::PostProcess is applied to populate the internal RenderMesh which is passed instead. This allows things like Displacement or Subdivision to be done on-the-fly at the rendering level (which is potentially more efficient). Add a render mesh processor, to be called before the mesh is sent for rendering.
virtual void SetRenderMeshPostProcessor ( [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [IRenderMeshPostProcessor](API\Runtime\GeometryFramework\Components\IRenderMeshPostProcessor) > Processor )